Initial commit

.gitignore

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+a.out

blit.c

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+#include <X11/Xlib.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+main(void) {
+  Display *display;
+  Window window;
+  XEvent event;
+
+  const char *msg = "Hello, world!\n";
+
+  int screen;
+
+  // Opens the current display
+  display = XOpenDisplay(NULL);
+
+  if (display == NULL) {
+    fprintf(stderr, "Could not open the display! :(\n");
+    exit(1);
+  }
+
+  printf("%p\n", display);
+
+  screen = DefaultScreen(display);
+
+  window = XCreateSimpleWindow(display,
+                               RootWindow(display, screen),
+                               10,
+                               10,
+                               100,
+                               100,
+                               1,
+                               BlackPixel(display, screen),
+                               WhitePixel(display, screen));
+
+  printf("%p\n", window);
+
+  XSelectInput(display,
+               window,
+               ExposureMask | KeyPressMask);
+
+  XMapWindow(display, window);
+
+  while (1) {
+    /* Event loop that handles events from the X server's event queue */
+    /* Will actually block if there are no events */
+
+    XNextEvent(display, &event);
+    if (event.type == Expose) {
+
+      XFillRectangle(display,
+                     window,
+                     DefaultGC(display, screen),
+                     20,
+                     20,
+                     10,
+                     10);
+
+      XDrawString(display,
+                  window,
+                  DefaultGC(display, screen),
+                  10,
+                  50,
+                  msg,
+                  strlen(msg));
+    }
+
+    if (event.type == KeyPress) {
+      break;
+    }
+
+  }
+
+  XCloseDisplay(display);
+
+  return 0;
+}

build.sh

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+#! /usr/bin/env bash
+
+
+xlib=$(pkg-config --cflags --libs x11)
+
+gcc $xlib blit.c